Type-writing machine.



No- 827,942. PATENTED AUG. '7, 1906. H. A. SANDBRSON.

TYPE WRITING MACHINE.

APPLICATION FILED NOV. 28. 1905.

WMe/ms UNITED STATES PATENT OFFICE.

WOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.-

Application filed November 28,1906. SorialNo- 289.413.

To all whom it may concern.-

Be it known that I, HOMER A. SANDERSON, a citizen of the United States, residing in Detroit, in the county of Wayne and State of Michigan, have invented certain new and 'useful Improvements in Type-Writing Machines, of which the following is a specification. I

This invention relates to the ribbon-winding mechanisms of type-writing machines, and particularly to means for automatically reversing the direction of winding. v The principal object of the invention is to provide a compact, inexpensive, and simple mechanism which may readily be placed upon machines as at resent manufactured, particularly those of the front-strike variet in which the spools are mounted in front the platen, one at each side of the printing-point.

The accompanying drawing is a perspective view showing my improvements applied to an Underwood front-strike writingmachine. l

In said machine types 1 strike through a ribbon 2 against the front side of a platen 3, the ribbon being wound upon spools 4 5 and threaded through a vibrator 6 between the spools. The spools are mounted upon the upper ends of shafts 7, on whose lower ends are fixed bevel-gears 8 9 to mesh with bevelpinions 10 11, fixed upon a transverse horizontal driving-shaft 12, which is movable endwise to bring either set of gears into mesh. The shaft 12 is held in either of its extreme positions by means of a yielding. detent mechanism comprisinga collar 13, fixed upon the-shaft and having a peripheral groove 14, in which one end 15 of a lever is inserted, said lever being pivoted at 16 upon the frame work and having in its upper end notches 17 .18. An arm 19, also pivoted on the frame work and pulled down by a spring 20, is provided with a roller 21' to engage said notches, whereby the shaft 12 is yieldingly' held against accidental displacement. The shaft s rotated by means of a ratchet-wheel 22, op-

erated by a pawl 23 at either type stroke. The wheel 22 is fixed to a gear 24, which isin mesh with a pinion 25, fixed uponthe shaft 12, the gear 24 being of sufficient width to accommodate the axial movements of the pin- I ion 25. When the ribbon is all paidofl from either spool-as, for instance, spool 4 -it Specification of Letters Patent.

Patented Aug. 7, mos;

ing-shaft 12 longitudinally, so as to disconnect the bevel-gears inone pair, as 9 11, and reconnect the gears-in the other pair, as 8 10. For this pur ose the ribbon is passed around a post 26, w 'chis fixed upon a spool-cup 27, the latter bein revoluble concentrically with. the spool-shaft 7 The post 26 is laced for-' fixed upon an arm or pair of arms 28. A.

sleeve or hollow shaft 29 surrounds the spoolshaft 7 and carries the arm 28 and cup 27, and of course is rotated by the movement of the ribbon just described. At its lower end the sleeve 29 carries a collar 30, having formed thereon a cam 31, which during the rotation of the sleeve engages a cam 32, formed on a finger or plate 33, and cams the latter downwardly. Said plate or finger is pivoted at 34 upon the framework and at its tip is bent downwardly at 35 and shapedto match the adjoining wormfixed upon the shaft 12. There are two of these worms,

formed right and left and designated'as 36- HOMER A. SAN DERSON, OE DETROIT, MICHIGAN, ASSIGNOR TO UNDER- I calls-into action' means forshifting the'driv- 37. When the finger 33 is cammed down, as

seen in dotted lines, it engages the worm 36,

and the latter, owing to the rotation of the shaft 12 cam'sthe latter endwise', so'that the bevel-gear 11 moves out of mesh and thebevel-gear 10 into mesh. Thereupon spool 4 begins to wind, and the spool-cup, the hollow shaft 29, and the cam 31 are returned to nor'- mal position by a spring 38, the finger 33 being elevated by a coiled spring 39, which is placed between the same bracket 40 which" carries the spool-shaft. l

It will be understood that when .the ribbon is all wound off from the s 001 5 similar operations take place to move t e shaft 12 in the opposite direction, so that theribbon will rewind on said spool.

Variations may be resorted to within the scope of my invention and portions of myimprovements may be used without others.

Having :thusdscribed my inventiomII I claim 1 In a type-writing machine, the combi-' nation with a pair of ribbon-spool. shafts and av driving-shaft movableendwise toconneet with said spool -shafts .in alternation, of 1 pivoted upon the framework and having proworms upon said driving-shaft, normally idle fingers movable into engagement withthe.

worms, cams mounted concentrically with the spool-shafts for forcing said fingers into engagement with the worms, and parts mounted upon'said cams in position to be engaged by the ribbon.

2. In a typewriting machine, the combination with a pair of. vertical shafts for winding the ribbon, of a horizontal driving-shaft movableendwise to connect with either of said vertical shafts, worms upon said drivingshaft, normally idle fingers pivoted upon the framework so'as to be movable into engagementwithsaid worms, cams for operatin said fingers, loose sleeves upon said vertica shafts, said cams being secured to the lower ends of said sleeves, and arms projecting from the upper ends of said sleeves and having parts in position to be engaged by the ribbon.

3. Ina type-writing machine, the combination witha pair of vertical shafts for winding the ribbon, of a horizontal, driving-shaft movable endwise to connect with either of said vertical shafts, worms upon said driving-- shaft, normally idle fingers pivoted upon the framework so as to be movable into engagement with said worms, cams. for operatin said fingers, loose sleeves upon saidv vertica shafts, said cams being secured to, the lower ends of said sleeves, and arms projecting from the upper ends of said-sleevesv and having parts position to be engaged bythe ribbon fil'ld'llbbOIl-SPOOl cups fixed upon said arms.

4. In=a type-writing. machine, the combination; with a pair of ribbon-spool cups,'0f a pairof ribbon-spool shafts,said cups mounted concentricallvwith .said shafts, a drivingshaft movable endwise to connect with either ing-shaft, a gear in mesh Wit of said. shafts, cams connected to said cups to be moved-thereby, fingers movable by said cams, worms uponsaid driving-shaft engageable by said fingers,land a; yielding detent for said driving-shaft. v P l 5. In a type-writing machinefthe combination with a pair of ribbon-spool shafts, of a driving-shaft movable endwise to engage with either spool-shaft, a pinion u on said drivsaid pinion, and a ratchet-wheel fixed to said ear and immovable in axial direction; a yie ding dedriving-shaft, and ribbon c'ont'rolled means for engaging said worms. I

6 ln a type-writing-machine, the'combi nation with a pair of upright ribbon-winding" shafts, of spool-cups, the shaftsbeing revoluble ind'ependently of said cups, and the latter being'movable by the ribbon, sleeves upon which'said on s are fixed, said sleeves jsur rounding said s afts, and the latter being revoluble independently of the sleeves, came upon the lower ends'of said sleeves, fingers jections engageable by said cams, returningsprings for said fingers, a driving-shaft movable endwise to engage either of said spoolshafts, worms upon said driving-shaft engageable by said finger, and a yielding detent for said driving-shaft.

7. In a type-writing machine," the combination with a pair of upright ribbon-winding shafts, of spool-cups, the shafts being revoluble independently of said cups, and the latter being movable by the ribbon, sleeves upon which said cups are fixed; said sleeves surrounding said-shafts, and the latter being revoluble independently of the sleeves, cams upon the lower ends of said sleeves, fingers pivoted'upon the framework and having pro,- jections engageable by said cams, returningsprings for said fingers, a driving-shaft movable endwise to engage either of said spoolshafts, worms upLgn said driving-shaft en-.

shafts of spool-cups, the shafts being rev-' oluble independently of said cups, andthe latter bein movable by the ribbon, sleeves upon whicl i said cups are fixed, said sleeves surrounding said shafts, and the latter being revoluble independently of the sleeves, cams upon the lower ends of said sleeves, fingers pivoted upon the framework and having projections engageable by said cams, returningspringsfor said fingers, a driving-shaft movable endwise to engage either'of said spoolshafts, worms upon'said driving-shaft engageable by said finger, and a yielding detent for said driving-shaft, and springs for returning said cups to normal positions after being moved by the ribbon.

9. In a type-writing machine, the coinbination with a vertical shaft for winding the ribbon, of a horizontal driving-shaft movable endwise toconnect with said vertical shaft, a worm upon said drivingshaft, a normally idle finger; pivoted 'uponthe framework so as to be movable into engagement with said Worm, a cam for operatin said finger, a loose sleeve upon said vertica shaft, said cam being secured to the lower end of said sleeve,

v and an arm projecting from the upper end of l sald sleeve and having a part in position to be engaged by the ribbon. y l1. In a type-Writing machine, the combibnation-with a ribbon-spool cup, or a ribbonspool shaft, said cupfrnounted concentrically With said shaft, a drivin -shaft movable end- Wise to connect with said shaft, a cam connected to said cup to be moved thereby, a

, finger movable by said cam, a worm upon said driving-shaft engageable by said finger,

and a yielding detent for said driving-shaft.

12. In a type-writing machine, the combination with a ribbon-spool shaft, of a drivingshaft movableendwise to engage With the spool-shaft, a inion upon saiddriving-shaft,

and ribbon-controlled means for engagement 20 With said Worm.

HOMER A. SANDERSON.

Witnesses:

W. P. AIRHEART, MARION ANDERSON. 

